Except as described in Section 9.9.1, solid fuel burning appliances shall not be installed in any garage unless installed in a separate room, either in or attached to the garage, that is accessible only from the outside. For a major repair garage, the required fire wall separation is two (2) hours. For a minor repair or parking garage, the required fire wall separation is one (1) hour. All combustion air must be taken from outside the building.
Solid fuel burning appliances using sealed combustion systems for which the air for combustion is taken from the outside may be installed in garages of one- and two-family dwellings.
02-658 C.M.R. ch. 9, § 9